5/8"-11 Grade 2 Zinc Finish NE Steel Nylon Insert Lock Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT NUT HEIGHT: 0.765 INCHES NOMINAL WIDTH ACROSS FLATS: 0.9375 INCHES NOMINAL THREAD SERIES: UNC THREAD QUANTITY PER INCH: 11 NOMINAL THREAD SIZE: 0.625 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: GRADE 2 NYLON INSERT LOCK NUT SURFACE TREATMENT: ZINC NUT